CVE-2021-37714 : Exploit Details and Defense Strategies

A detailed overview of the CVE-2021-37714 vulnerability affecting jsoup library versions < 1.14.2.

Understanding CVE-2021-37714

This section will cover what CVE-2021-37714 is, its impact, technical details, mitigation, and prevention measures.

What is CVE-2021-37714?

CVE-2021-37714 is a vulnerability in the jsoup Java library < 1.14.2, allowing DOS attacks when parsing untrusted HTML/XML.

The Impact of CVE-2021-37714

The vulnerability's CVSS base score is 7.5 (High), with low attack complexity and high availability impact.

Technical Details of CVE-2021-37714

Learn about the vulnerability description, affected systems, versions, and exploitation mechanisms.

Vulnerability Description

jsoup < 1.14.2 can be exploited by crafted input to cause the parser to loop indefinitely, slow down, or throw exceptions.

Affected Systems and Versions

Users of jsoup versions earlier than 1.14.2 are susceptible to DOS attacks through crafted input manipulation.

Exploitation Mechanism

Attacks leveraging CVE-2021-37714 target the parser's behavior, causing delays or crashes through user input manipulation.

Mitigation and Prevention

Discover immediate steps, security best practices, and patching recommendations to safeguard against CVE-2021-37714.

Immediate Steps to Take

Implement rate limits, restrict input sizes, and employ thread watchdogs to mitigate vulnerabilities until patching.

Long-Term Security Practices

Prioritize regular security updates, secure coding practices, and monitoring for anomalous parsing behaviors.

Patching and Updates

Upgrade to jsoup version 1.14.2 or newer, apply security patches promptly, and stay informed about future releases.